<h1>Employee listing</h1>
<form method="post" >
    <p>Enter Department ID:
        <input type="text" name="dept_id" size="4">
        <input type="submit" name="submit" value="submit"><p>
</form>

<?php
$hostname = "localhost";
$username = "root";
$password = "secret";
$database = "prod";

if (IsSet ($_POST['submit'])) {

    $dbh = new mysqli($hostname, $username, $password, $database);

    /* check connection */
    if (mysqli_connect_errno()) {
        printf("Connect failed: %s\n", mysqli_connect_error());
        exit ();
    }
    $dept_id = $_POST['dept_id'];

    if ($result_set = $dbh->query("call employee_list( $dept_id )")) {
        print ('<table border="1" width="30%"> <tr> '.
            '<td>Employee_id</td><td>Surname</td><td>Firstname</td></tr>');
        while ($row = $result_set->fetch_object()) {
            printf("<tr><td>%s</td><td>%s</td><td>%s</td></tr>\n",
                $row->employee_id, $row->surname, $row->firstname);
        }
    } else {
        printf("<p>Error:%d (%s) %s\n", mysqli_errno($dbh),
            mysqli_sqlstate($dbh), mysqli_error($dbh));
    }
    print ("</table> ");
    $dbh->close();
}
?>


<?php

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/8/20
 * Time: 10:25
 */
class 调用MySQL存储过程并获得返回值
{

}